I've done some touring on the Pittsburgh to DC trail - navigation is simple, you start at one end and follow the trail to the other end. This year I hope to take two on-road tours in places I'm not familiar with, and they're not marked as bike routes so I'm going to face a new task in navigating.
Realizing that I can sure ride but I don't know a lot about navigating-while-riding, I've taken myself on a few complex rides in areas I don't know, and I've found that navigating is a task that (at my present skillset) seems to involve me stopping a lot.
May I ask, how do you handle on-the-bike touring navigation? Is it a paper map? A cue sheet? A GPS with audio turn commands?